To run a 5k in 18 min, hold 5'48" per mile, i.e. 10.36 mph (3'36"/km). At that pace: 5K in 18'00", 10K in 36'00", half marathon in 1h15'57", marathon in 2h31'54".
5K in 18 min: 5'48"/mile
1 track lap = 1'26"4
1 track lap = 1'26"4
To run a 5k in 18 min, hold 5'48" per mile, i.e. 10.36 mph (3'36"/km). At that pace: 5K in 18'00", 10K in 36'00", half marathon in 1h15'57", marathon in 2h31'54".